MAX4036MAX4039 19-3142 Rev 5 11/09 Low I , +1.4V/800nA, Rail-to-Rail Op Amps BIAS with +1.2V Buffered Reference General Description Features Ultra-Low 800nA per Amplifier Supply Current The single MAX4036/MAX4037 and dual MAX4038/ MAX4039 operational amplifiers operate from a single Ultra-Low 1.4V Supply Voltage Operation (1.8V for +1.4V to +3.6V (without reference) or +1.8V to +3.6V (with MAX4037/MAX4039) reference) supply and consume only 800nA of supply Rail-to-Rail Outputs Drive 5k and 5000pF Load current per amplifier, and 1.1A for the optional refer- 1.232V 0.5%, 120ppm/C (max) Reference ence. The MAX4036/MAX4038 feature a common-mode (MAX4037/MAX4039) input voltage range from 0V to V - 0.4V at V = 1.4V. DD DD The MAX4037/MAX4039 feature a 1.232V voltage refer- No External Reference Bypass Capacitor Required ence capable of sourcing 100A and sinking 20A. No Phase Reversal for Overdriven Inputs The MAX4036MAX4039s rail-to-rail outputs drive 5k loads to within 25mV of the rails. Ultra-low supply current, Low 1.0pA (typ) Input Bias Current low operating voltage, and rail-to-rail outputs make the Low 200V Input Offset Voltage MAX4036MAX4039 ideal for use in single-cell lithium-ion Unity-Gain Stable (Li+), or two-cell NiCd/NiMH/alkaline battery-powered Available in Tiny UCSP, SC70, SOT23, TDFN, and applications. MAX Packages The MAX4036 is available in an SC70 package, the Available in -40C to +125C Temperature Range MAX4037 in a SOT23 package, and the MAX4038/ (MAX4036A/MAX4038A) MAX4039 in UCSP, MAX , and TDFN packages. Ordering Information Applications PIN- TOP Battery-Powered/Solar-Powered Systems PART TEMP RANGE PACKAGE MARK Portable Medical Instrumentation MAX4036EXK-T -40C to +85C 5 SC70 AFR Pagers and Cell Phones MAX4036AAXK+T -40C to +125C 5 SC70 ASN Micropower Thermostats and Potentiostats MAX4037EUT-T -40C to +85C 6 SOT23 ABRX Electrometer Amplifiers MAX4038ETA-T -40C to +85C 8 TDFN-EP* AGO Remote Sensor Amplifiers MAX4038EUA -40C to +85C 8 MAX Active Badges MAX4038EBL-T -40C to +85C 9 UCSP AEG MAX4038AAUA -40C to +125C 8 MAX pH Meters +Denotes a lead(Pb)-free/RoHS-compliant package. Pin Configurations and Selector Guide appear at end of -Denotes a package containing lead. data sheet. *EP = Exposed pad. MAX is a registered trademark and UCSP is a trademark of Ordering Information continued at end of data sheet. Maxim Integrated Products, Inc. Functional Diagram Typical Operating Circuit 3V OUTA V DD INA- MAX4039 V OUTA DD OUTB INA- INA+ SENSOR MAX4039 REF INB- INB- INA+ REF INB+ INB+ OUTB ADC REF V V SS SS THREE-ELECTRODE POTENTIOSTAT APPLICATION Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Low I , +1.4V/800nA, Rail-to-Rail Op Amps BIAS with +1.2V Buffered Reference ABSOLUTE MAXIMUM RATINGS V to V .............................................................-0.3V to +4.0V 9-Bump UCSP (derate 5.2mW/C above +70C).........412mW DD SS INA+, INB+, INA-, INB-, IN+, IN-, OUTA, 10-Pin MAX (derate 5.6mW/C above +70C) ...........444mW OUTB, OUT, REF .........................(V - 0.3V) to (V + 0.3V) 10-Pin TDFN (derate 24.4mW/C above +70C) .......1951mW SS DD OUTA, OUTB, OUT, REF Shorted to V or V .......Continuous Operating Temperature Range SS DD Maximum Continuous Power Dissipation (T = +70C) MAX403 E ...................................................-40C to +85C A 5-Pin SC70 (derate 3.1mW/C above +70C)..............247mW MAX403 A ................................................-40C to +125C 6-Pin SOT23 (derate 8.7mW/C above +70C)............696mW Junction Temperature .....................................................+150C 8-Pin MAX (derate 4.5mW/C above +70C) .............362mW Storage Temperature Range .............................-65C to +150C 8-Pin TDFN (derate 24.4mW/C above +70C) .........1951mW Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +3V, V = V = 0V, V = V /2, R to V /2, C = 15pF, T = +25C, unless otherwise specified.) DD SS CM OUT DD L DD L A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX4036/MAX4038, guaranteed by PSRR 1.4 3.6 tests Supply Voltage Range V V DD MAX4037/MAX4039, guaranteed by PSRR 1.8 3.6 and line regulation tests V = 1.4V 0.8 1.2 DD MAX4036 V = 3.6V 0.9 1.3 DD V = 1.8V 1.9 2.4 DD MAX4037 V = 3.6V 2.0 2.5 DD Supply Current I A DD V = 1.4V 1.7 2.3 DD MAX4038 V = 3.6V 1.9 2.5 DD V = 1.8V 2.8 4.0 DD MAX4039 V = 3.6V 3.0 4.1 DD OPERATIONAL AMPLIFIERS Input Offset Voltage V 0.2 2.0 mV OS Input Bias Current I (Note 1) 1.0 10 pA B Input Offset Current I (Note 1) 0.3 20 pA OS V = 1.4V V - D D DD V SS ( M AX40 36/M AX40 38 only) 0.4 Input Common-Mode Voltage Guaranteed by V - DD V V = 1.8V V V CM DD SS Range CMRR test 0.3 V - DD V = 3.3V V DD SS 0.2 V = 1.4V, V V (V - 0.4V) DD SS CM DD 50 70 (MAX4036/MAX4038 only) Common-Mode Rejection Ratio CMRR dB V = 1.8V, V V (V - 0.3V) 50 70 DD SS CM DD V = 3.3V, V V (V - 0.2V) 56 76 DD SS CM DD 1.4V V 3.6V (MAX4036/MAX4038 DD 62 82 only) Power-Supply Rejection Ratio PSRR dB 1.8V V 3.6V 62 84 DD 2 MAX4036MAX4039